Using advanced filtration technology, Marineland’s Bio-Wheel Emperor Power Filter helps keep your aquarium crystal clear. It offers complete three-stage filtration for both freshwater and saltwater tanks. The Rite-Size filter cartridge traps debris and removes odors and discoloration, providing mechanical as well as chemical filtration. An extra-large BIO-Wheel rotates to cultivate the beneficial bacteria that remove toxic ammonia and nitrates from the water. The Bio-Wheel Emperor filters 400 gallons per hour for aquariums up to 80 gallons and almost twice the filter cartridge capacity of comparable models. With a dual-impeller design and efficient flow, this powerful filter contributes to a healthier environment for your fish.